We're dividing 7056641 by 90 
The aim is to understand the frequency of 90 in 7056641.

Advancing to step 1:
If we divide 7 by 90, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (0) from the dividend and append it to 7, then repeat: 70 / 90

Moving on to step 2:
90 goes into 70 0 times with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 70 to get 70.
Bring next digit (5) of the dividend behind the 70 and repeat the process: 705 / 90

On to step 3:
The number 90 fits into 705 7 times, leaving a remainder of 75.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 630 away from 705, we end up with 75.
Grab the next digit (6) from the dividend, add it to 75, then carry on: 756 / 90

Let's proceed to step 4:
90 goes into 756 8 times with a remainder of 36.
Write down 8 as next digit of the result. 
Result so far: 78.0
If we subtract 720 from 756, we get 36.
Grab the next digit (6) from the dividend, add it to 36, then carry on: 366 / 90

Advancing to step 5:
The number 90 fits into 366 4 times, leaving a remainder of 6.
The next digit of our result is 4. 
Result so far: 784.0
Subtracting 360 from 366 leaves us with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 90

Advancing to step 6:
64 divided by 90 is 0 with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 7840.0
Subtracting 0 from 64 leaves us with 64.
Include the next digit (1) from the dividend after 64, then repeat: 641 / 90

Moving on to step 7:
If we divide 641 by 90, we get 7 and a remainder of 11.
Use 7 as the next digit of our solution. 
Result so far: 78407.0
Subtract 630 from 641 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 8:
If we divide 110 by 90, we get 1 and a remainder of 20.
The next digit of our result is 1. 
Result so far: 78407.1
The remainder is 20 after subtracting 90 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
90 goes into 200 2 times with a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 78407.12
Subtracting 180 from 200 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 10:
The number 90 fits into 200 2 times, leaving a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 78407.122
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 78407.122, with a leftover of 0.002.